asyncrat | ccbb99114b1f340bdfe220b1696842dea2a704c5b4074648a9005e779a5a3af3

Reason

Machine shutdown

General

Target

AsyncClient.exe
Size

47KB
MD5

5a1dd7c7ab825fdd25e096f811536bba
SHA1

f9d4a166781402ee00baf5ab13b8783041940f2a
SHA256

ccbb99114b1f340bdfe220b1696842dea2a704c5b4074648a9005e779a5a3af3
SHA512

bca94c03c9455ba34c816fa9ddc05214ac8446a53def82c95160b82a9b976fc2b3a682ec94add7efe1f5976d126f7b8fd479140a3daac87900e98d243ed628ff
SSDEEP

768:kujY21TUET1/WUT1V9mo2qz6xAz3cYwsmPIB9+WVGdfz0bkA5UxMbY2sdDinMnBJ:kujY21TU0r24MHwB99VGybkoUxB20Die

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

w-delivery.gl.at.ply.gg:3149

Mutex

Tqle8mOZFqYB

Attributes

delay
3
install
true
install_file
i love men.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000b000000023b60-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	AsyncClient.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	i love men.exe

Executes dropped EXE 1 IoCs

pid	Process
3324	i love men.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	i love men.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	shutdown.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ipconfig.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2556	timeout.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
6928	ipconfig.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "218"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4476	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
4436	AsyncClient.exe
3324	i love men.exe
3324	i love men.exe
3324	i love men.exe
3324	i love men.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	AsyncClient.exe
Token: SeDebugPrivilege	3324	i love men.exe
Token: SeDebugPrivilege	3324	i love men.exe
Token: SeShutdownPrivilege	7148	shutdown.exe
Token: SeRemoteShutdownPrivilege	7148	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5712	LogonUI.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 2016	4436	AsyncClient.exe	87
PID 4436 wrote to memory of 2016	4436	AsyncClient.exe	87
PID 4436 wrote to memory of 2016	4436	AsyncClient.exe	87
PID 4436 wrote to memory of 3796	4436	AsyncClient.exe	89
PID 4436 wrote to memory of 3796	4436	AsyncClient.exe	89
PID 4436 wrote to memory of 3796	4436	AsyncClient.exe	89
PID 2016 wrote to memory of 4476	2016	cmd.exe	91
PID 2016 wrote to memory of 4476	2016	cmd.exe	91
PID 2016 wrote to memory of 4476	2016	cmd.exe	91
PID 3796 wrote to memory of 2556	3796	cmd.exe	92
PID 3796 wrote to memory of 2556	3796	cmd.exe	92
PID 3796 wrote to memory of 2556	3796	cmd.exe	92
PID 3796 wrote to memory of 3324	3796	cmd.exe	94
PID 3796 wrote to memory of 3324	3796	cmd.exe	94
PID 3796 wrote to memory of 3324	3796	cmd.exe	94
PID 3324 wrote to memory of 6868	3324	i love men.exe	99
PID 3324 wrote to memory of 6868	3324	i love men.exe	99
PID 3324 wrote to memory of 6868	3324	i love men.exe	99
PID 6868 wrote to memory of 6928	6868	cmd.exe	101
PID 6868 wrote to memory of 6928	6868	cmd.exe	101
PID 6868 wrote to memory of 6928	6868	cmd.exe	101
PID 3324 wrote to memory of 7092	3324	i love men.exe	102
PID 3324 wrote to memory of 7092	3324	i love men.exe	102
PID 3324 wrote to memory of 7092	3324	i love men.exe	102
PID 7092 wrote to memory of 7148	7092	cmd.exe	104
PID 7092 wrote to memory of 7148	7092	cmd.exe	104
PID 7092 wrote to memory of 7148	7092	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "i love men" /tr '"C:\Users\Admin\AppData\Roaming\i love men.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "i love men" /tr '"C:\Users\Admin\AppData\Roaming\i love men.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4476
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8443.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3796
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2556
- - C:\Users\Admin\AppData\Roaming\i love men.exe
    "C:\Users\Admin\AppData\Roaming\i love men.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3324
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:6868
    - - C:\Windows\SysWOW64\ipconfig.exe
        
        ipconfig
        5⤵
        System Location Discovery: System Language Discovery
        Gathers network information
        
        PID:6928
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c Shutdown /r /f /t 00
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:7092
    - - C:\Windows\SysWOW64\shutdown.exe
        
        Shutdown /r /f /t 00
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:7148

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39ae855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:5712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8443.tmp.bat

Filesize
154B

MD5
2ee4e6add042c1b089750099252db34f

SHA1
338121cbc52951a04f1f5b80f1f9b00c779e901e

SHA256
ca61078c43210bc6d98665cf2d73b63197a0b93d10cbb663bf3fd0373005a4aa

SHA512
23220e3750c24bb4761ce8fba4df01e63922d05325f18d1099bcd5e387ddfe4bcf504064f49fac62370efe51556939c07f95540437d829628c7a8b508a6930cc

Download Submit
C:\Users\Admin\AppData\Roaming\i love men.exe

Filesize
47KB

MD5
5a1dd7c7ab825fdd25e096f811536bba

SHA1
f9d4a166781402ee00baf5ab13b8783041940f2a

SHA256
ccbb99114b1f340bdfe220b1696842dea2a704c5b4074648a9005e779a5a3af3

SHA512
bca94c03c9455ba34c816fa9ddc05214ac8446a53def82c95160b82a9b976fc2b3a682ec94add7efe1f5976d126f7b8fd479140a3daac87900e98d243ed628ff

Download Submit
memory/3324-19-0x0000000006EA0000-0x0000000006F16000-memory.dmp

Filesize
472KB

Download
memory/3324-21-0x0000000006F40000-0x0000000006F5E000-memory.dmp

Filesize
120KB

Download
memory/3324-25-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/3324-24-0x0000000006350000-0x00000000063B4000-memory.dmp

Filesize
400KB

Download
memory/3324-23-0x0000000001530000-0x00000000015C2000-memory.dmp

Filesize
584KB

Download
memory/3324-22-0x0000000007130000-0x00000000071C2000-memory.dmp

Filesize
584KB

Download
memory/3324-14-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/3324-15-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/3324-18-0x00000000066F0000-0x0000000006C94000-memory.dmp

Filesize
5.6MB

Download
memory/3324-20-0x0000000006640000-0x00000000066A8000-memory.dmp

Filesize
416KB

Download
memory/4436-2-0x00000000753E0000-0x0000000075B90000-memory.dmp

Filesize
7.7MB

Download
memory/4436-0-0x00000000753EE000-0x00000000753EF000-memory.dmp

Filesize
4KB

Download
memory/4436-1-0x0000000000E40000-0x0000000000E52000-memory.dmp

Filesize
72KB

Download
memory/4436-3-0x00000000057F0000-0x0000000005856000-memory.dmp

Filesize
408KB

Download
memory/4436-9-0x00000000753E0000-0x0000000075B90000-memory.dmp

Filesize
7.7MB

Download
memory/4436-4-0x0000000005C90000-0x0000000005D2C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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